Diaphragm pump



FIG. 1 is a front perspective of a diaphragm pump of this invention;

FIG. 2 is a front elevational view of the diaphragm pump of FIG. 1;

FIG. 3 is a rear elevational view of the diaphragm pump of FIG. 1;

FIG. 4 is a side view from the right side of FIG. 1 of the diaphragm pump of this invention;

FIG. 5 is a view similar to FIG. 4, from the opposite side thereof;

FIG. 6 is a top plan view of the diaphragm pump of FIG. 1;

FIG. 7 is a bottom plan view of the diaphragm pump of FIG. 1; and,

FIG. 8 is a front perspective view of a second embodiment of the diaphragm pump of this invention. 

The ornamental design for a "diaphragm pump," as shown and described. 